Ultraviolet light can make indoor spaces safer during the pandemic – if it’s used the right way

Image: UV disinfection, which can be performed by robots like this, reduces hospital-acquired infections. Marcy Sanchez / William Beaumont Army Medical Center Public Affairs Office. Article by Karl Linden.

Ultraviolet light has a long history as a disinfectant and the SARS-CoV-2 virus, which causes COVID-19, is readily rendered harmless by UV light. The question is how best to harness UV light to fight the spread of the virus and protect human health as people work, study, and shop indoors.

The virus spreads in several ways. The main route of transmission is through person-to-person contact via aerosols and droplets emitted when an infected person breathes, talks, sings or coughs. The virus can also be transmitted when people touch their faces shortly after touching surfaces that have been contaminated by infected individuals. This is of particular concern in health-care settings, retail spaces where people frequently touch counters and merchandise, and in buses, trains and planes. […]

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